Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 976
ar on switch con-tacts, controller contacts, controller magnets, commutator,armature, steel worm, bronze gear or gears, thrust plates,ball bearings, armature bearings, drum-shaft bearings, theear cables, the counterweight • cables and the back-drumcables are all materially increased also by… … \
